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A, The in vitro cell viability of L929 cells after incubation with various concentrations (0, 100, 200, and 500 µg/mL) of Gd-MSN@uFe-Bt-NPs for 24 and 48 hours. B, The in vitro cell viability of MCF-7 cells incubated with Gd-MSN@uFe-Bt-NPs at concentrations of 3.125, 6.25, 12.5, 50, and 100 µg/mL for 24 and 48 hours. C, Cellular uptake of Gd-MSN@uFe-Bt-NPs.
